Ximproved m mode of



UNITED". STATES PATENT OF ICE.

THOMAS COYLl-I, U1" BALTIMORE, ARYLASD.

'iMPROVED MODE 0F APPLYING CEMENT IN MAKING ClSTRNS.'RESEfiVOlRS. PIERS.&c.

$pct'ilituliim t'onning part of L tters To all whom it may com-cm Be itknown that l, Tumus ortia, ot'ihe cityot' Baltimore, State of Maryland.have in vented, constructed. made, and applied touse a new and usefulImprovement in the Modem iron kettle over nsntlicient tire to meltit,altcr which tlz-eclay must be added until it assumes thoroughlystirred and boiled until it becomes a dark-brown color and sutlicicutlyelastic Patent \'o. 355 dated .tugu-t ll", k227i In forming vessels tokeep out water it is necessary. lirst. to lind if the gravity of theccnient itself will resist the pressurcot' water. it not. let asutlicit-ut body 0l'cl1l \'bc put. over the cement. and. it' uecessannaplank floor \vell braced over all.

= leave a vacancy between the brick or stones I sutficieut to form aninner space of about an inch. Then grout with the cement. by which 5means the wall becomes pcriectly impervious to water.

In forming the walls oi columns of bridges let a box surround the stonesfoiming'thc wall, pour the boiling cement in in sutlleieut quantitlestill the water is 'disgorged and the loun- 5 (lotion-stones reached,which will become as tirmly cemented as it there was an absence of allwater. For chambers of canals. vaults, a stoutuess of thickplastcriug-mortar, then is the same.

that the action of the cold will not cause it to crack, and sutlicicntlyhard that the action of i the sun will not canse it. it expo ed. to run.1

'l'besceuds may be obtained by judicious hoiling. The cement musthcalways applied while I hot,'aud it will require a hot instrument tospread it.

In forming a. wall or vessel oi any kind,

formed of planks or bricks. having a space or sutlicient width to formthethirltness ot' the wall intended to. be cast. then pour in the ccmentuntil the space he llllml. When the cemcnt becomes hard the planks canbe removed. To prevent the lanks from adhering. let paper or some othersubstance be spread over theta. after which, the cement bec mes hard,the planks can be reiumcd with ease and dispatch.

In forming a bottom to a. cistern or any other vessel care must be takento cut oil all the paper where thejoiuts are t'ormcd,or where the hotand the cold cement is iutcuded to be united.

Although I have described the manner of using and applying this cementfor various purposes, I wish it to be distinctly nudcrsttnul that I donot claim to be the imfentor-uf the. cement itself or of its applicationto keep out moisture in cellars, vaults. &c.: nordo I claim theapplication thereof to such purposes in a heated state. this beingnecessary in all cases 1 and a thing well known; but either to keep inor out water, let a frame be i l l I day oRAngust, in the year of ourLord 1537.

TIIOBIAS COYLB.

\\ itncsses:

Owns Cosxornr, Jomt 0.0mm.

It is a general rule to

